Precision Tapered Roller Bearings

In some overloaded and there are certain requirements for speed machine applications where snagging --- such as forgings, oil pipeline threading machines, heavy lathes and milling machines, select precision tapered roller bearings are an ideal solution . Tapered Roller roller bearing is line contact is designed so that it can provide high rigidity and load bearing spindle; In addition, the tapered roller bearing is a pure rolling bearing design, it is a good lower bearing operation torque and heat, thus ensuring the spindle speed and accuracy. Tapered roller bearings can be adjusted during installation the axial preload (clearance), which allows customers throughout the life of the bearing to better optimize the bearing clearance adjustment.
Furthermore, in some inner block edges speeds greater than 30 m / sec high-speed applications, Four-Row Taper Roller Bearings some special design can meet the requirements. Bearing a plurality of ribs in the axial direction of the lubrication holes, can be circulating oil lubrication or oil mist lubrication, oil can be distributed to the centrifugal force roller and rib contact area, so that it can more fully lubricated bearings, bearing speed increase . The Hydra-Rib hydrodynamic bearing a floating wall is designed to optimize preload spindle system designed floatable wall bearing in contact with the roller large end, unlike common bearing a fixed inner wall; and The floating ribs from the "pressure" system location, so we can keep the bearings at various operating conditions can play a most excellent performance, and has been successfully used in domestic customers.
For tapered roller bearings in terms of the accuracy of selection, ISO P5 grade bearings are used in conventional lathes and milling machines; if the machining centers, grinders and other applications, often choose ISO P4 or more of precision bearings. Spindle design, the more common layout tapered roller bearings have two. The first is the use of a front and rear of each tapered roller bearings, and face to face installation; compact type of design structure, rigidity and ease of installation and adjustment.
The second is the use of two four row cylindrical roller bearings mounted opposite the front end of a main shaft, while the rear end uses a double outer ring, the inner ring of the bearing two single (TDO) to use as a floating end; because of the floating capability, this type of design can good withstand axial thermal expansion of the spindle and high rigidity to ensure the accuracy of machine tools.